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Iowa OS/OW Permit Requirements

United States · Iowa DOT — Office of Motor Carrier Services

Everything heavy-haul carriers need to know before moving an oversize or overweight load through Iowa: survey triggers, fees, lead times and the official permit portal.

Lead time
3 business days
Base fee
$35 single-trip; $400 annual
Permit validity
Up to 5 days

Route survey triggers

  • Height
    Height exceeds 13'6" — oversize permit required
  • Width
    Width exceeds 8'6" — oversize permit required
  • Length
    Length exceeds 65' — oversize permit required
  • Weight
    Gross weight exceeds 80,000 lbs — overweight permit required
  • Width
    Width exceeds 16' — route survey required
  • Height
    Height exceeds 15' — route survey required
  • Weight
    Gross weight exceeds 200,000 lbs — special superload permit required

Fee notes

Single-trip $35. Annual blanket $400. Overweight surcharge $5–$150 by weight class. Superload engineering review billed at $80/hr DOT rate.

Official resources

Reference information last verified May 2026. Always confirm current requirements with Iowa DOT — Office of Motor Carrier Services.

Surveying a route through Iowa?

RoadScope generates Iowa-compliant survey reports automatically — the right sections, certifications and documentation for Iowa DOT — Office of Motor Carrier Services.

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